What is the maximum number of OSPF routers can do load balancing?

[Maivoko]

What is the maximum number of OSPF routers can do load balancing?

Number of DR and BDR in one OSPF area - Cisco Community

this link said only one DR and one BDR, does it mean one kind of traffic can only have maximum 2 OSPF routers to load balancing traffic to Internet ?

2 routers traffic A, 2 routers traffic B, 2 routers traffic C

BGP + OSPF routers is a multiple of 2 when core switch router divided traffic using MSTP and using EIGRP with route map to divide traffic with source subnet to traffic A routers and traffic B routers and traffic C routers ?

[paul driver · Accepted solution]

Hello
Your OP is not that very clear

However all routers running OSPF/BGP can do load share, Equal Cost MultiPath (ECMP) is the LB method they can use , With OSPF by default its applicable to 4 paths and upto a maximum of 16.

[Joseph W. Doherty]

You misunderstand - there is no direct correlation between DR/BDR and load balancing.

"What is the maximum number of OSPF routers can do load balancing?"

It's the same number as how many OSPF routers you have.

[Maivoko]

by default its applicable to 4 paths and upto a maximum of 16.

I got it.

DR and BDR may not be gateway

[Joseph W. Doherty]

Oh, you didn't want to know maximum number of OSPF routers, as asked, but maximum number of same destination OSPF routes?  Ah, well as provided by @paul driver, for OSPF the default is 4.  However, although Paul notes maximum is 16, that's true for most current IOS versions, I've read some now accept 32 (IOS-XR?); earlier versions, I recall (?) supported maximum being less, e.g. 6, in version 11. (Also, the default and maximum can vary with other vendors; RFC might not have defined a default nor maximum.)

Also, BTW, DR/BDR can be a gateway, at least as "gateway" is commonly defined.

[Maivoko]

Past colleague told DR as gateway.

I had already known DR may not be gateway, I can use

sh ip route to find 0.0.0.0 default gateway

to compare whether it is DR

you said maximum number of same destination OSPF routes default 4 maxmium 16

so, what is maximum number of different destination OSPF routes ?

[MHM Cisco World]

there are two type of traffic 
data traffic and routing traffic 
routing traffic with elect DR/BDR where instead of each router send/receive LSA the router elect DR/BDR and send LSA to only DR/BDR and DR/BDR will forward it to all routers. 
later there is Data traffic which can be load by any routers in same broadcast.